Headlight for motor vehicles



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HEADLIGHT FOR MOTOR VEHICLES Filed May 15, '1922 mvEN-rons CHARLES"nso-Yu, y

PERRY B.CLARK mi ATTYS..

Fatented Agir. 8, lge.,

entr

`CHARLES T. BOYDIAIJD PERRY B. CLARK,

18F OLURBUS, GHR?.

HEDLIGHT FOR MGTOI?) VEHDGLES.

Apnicatcn tiled. may 15,

To all 'zr/10min? may concern.'

Be it known that we, CHARLES T. Born and lnnnr B. CLARK, citizens of theUnited States, residing at Columbus, in the county of Franklin and Stateof Ohio, have inventu cd a certain new and useful Improvement inHeadlights for Motor Vehicles, of' which the 'following is aspecification.

The c hiefobjectot the invention 'is to ob tain for motor vehicles ampleroad illumination and an avoidance of' the highly dann ferons glarecommon with many forms of' vehicle light.

rlhe invention is embodied in the example herein shown and described.the features of novelty being finally claimed.

ln the drawingr attached hereto- Y Figure l is mainly a centralsectional View of the invention some parte being in full, and

Fig. 2 is a front view of the rear or secondary reflector alone.

Like characters ot' reference designate corresponding parts in the twoviews.

The primary reflectorl 5 is of paraboloid form. Said reflector containsan ordinary electric lamp (3 constituting f the source of' illumination.The socket member or holder' of the lamp 6 is provided with the usualadjusting screw 7 for adjusting it with respect to the focus of thereflector. ary or road illuminating reflector consists of a sphericalsegi'ncnt 8 to the left of the line A-B Fig. l having:r a rim 8" (alsoreflecting) extended from the periphery of the spherical segment asshown to the right ot' the line A-ll inthe form of a partial section ot'a truncated cone. shown to be substantially a tangential ex-l tension ofthe segment 8 with the two re fleeting surfaces preferably blended asone.

"lhc segment S is not necessarily that ot' a truc sphere but may, insome instances. be

' somewhat flattened so as to be aspherical as indicated by thc adjacentbroken lines so as to rai-y. for example. the focalizing of the lightand prevent spherical aberration.

The two reflectors are arranged with respect to each other so that thedirect and reflected rays from the paraboloid or primary reflector 5 arethrown mainly upward toward and upon'the upper portion of the secondaryreflector.

The second- The rim 8 is 3.922. Serial No. E.

The two reflectors are shown as mounted upon a bracket 9 having onebranch 10 slotted for connection by suitable clamping means lwith aslotted arm 12 secured to the rear of the secondary reflector and another branch lil-slotted for connection by suitable clampingmeans'lflwith a slotted stem 15 on the primary reflector. By these meanseither of the reflectors can be adjusted withA reference to the `otherto obtain concentration or to make desired variations in the charac-teror direction of the beam. ln order to prevent considerable or strongrays from passing laterally into space beyond the rim @t the secondaryreflector the primary reflector should be so arranged with reference tothe secondary reflector that the ontermost direct rays from the lamp areintercepted within the edge of the conical extension ot' the secondaryreflector as indicated on the drawing.

Thebeam'obtained is a compound one Qt substantially parallel rays with aconcentration ot some rays due to the s herical or aspherical portion ofthe secon( ary reflector. T he beam may be projected ahead or it may bedeflected so as to strike the road at a particular required distanceforward ol the vehicle.. Because the primary 1'eflector screens the lampfrom sending direct rays forward there is no glare and the road isilluminated with reflected rays only.

The relative size and the forms of the several parts can be changed,Without departing from the P@ist of the 'invention as .claimed y Whatwe claim is:

A light for a vehicle comprising, in co1nhination, a reflect-orconsisting of a concave segment of substantially a sphere and asubstantially tanffential rim extension thereof in the form ot' afrustum of a` cone and` an illuminating reflector. directed toward thefirst named reflect-or, said illuminating rc lector constructed to have.its rays confined substantially to said first named reflector andcontaining means for producing a light therein whereby a beam compoundedlongitudinally of a central concentrated porw tion inclosed bya lessconcentrated portion is produced. I

CHARLES T. BYD PERRY B. CLARK

